In a previous report, the author critiqued the 1988 Silver Burdette & Ginn elementary social studies series (Silver Burdett & Ginn Social Studies), treating it as a representative example of what has been called the de facto national curriculum in elementary social studies. The present report begins with brief critiques of three other market-share series: the 1987 Macmillan Social Studies series, the 1987 Ginn Social Studies series, and the 1986 Holt Social Studies series. It concludes that the latter two series are superior to the former two as vehicles for teaching elementary social studies for understanding, appreciation, and application, but it also notes that all of the series have significant drawbacks and thus are not consistently or unambiguously distinctive as sets of curriculum materials. Various distinctive materials are available in social studies, however, in the form of supplementary materials that focus on limited topics. Most of these are targeted for the secondary grades, but some have been developed for (or at least are usable in) the elementary grades. Several sets of these distinctive materials are critiqued in the areas of economics; government and law, history; and critical thinking, reasoning, and decision making. A 27-item list of references and an appendix containing the framing questions used in this research are included. (Author/DB)